Celestion 25 and 44 and 66 all used the same woofer.
There were two versions of this woofer , but both work exactly the same for bass and lower midrange.
One version has a larger dust cap and the other smaller , and that can affect the upper midrange ,
part of which is from this driver in the 25.
The 25 was designed to be a high efficiency loudspeaker , to allow for lower powered amplifiers used , and still sound loud ,
but it is only useful for Rock and some types of Pop music.
Its midrange quality is too rough for Classical and various other types of music.

There are a lot of Specifications and some measurements posted for the woofer in the very long thread titled:
celestion 66 needs Mid-range
started by:
Mr_White

The issues about the ABR bass quality will be addressed in part soon in the latter pages of the above thread ,
in the 90s numbered pages when I have time available to continue there.